Community Water System · PWSID WI1570113

La Valle Waterworks

Serves 365 peopleGroundwaterOwner: Local GovernmentLa Valle, Wisconsin
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On record since 2020: 7 violations. 6 over the limit · 1 notice or report. Most recent began 2021-01-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

6Over the limit
0Treatment lapse
0Missed or late test
1Notice or report

More violations on record than 91% of active water systems in Wisconsin. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152020 · Over the limit: 52020 · Over the limit: 52020 · Over the limit: 52020 · Over the limit: 52020 · Over the limit: 52020 · Notice or report: 120202021 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
86% over the limit · 614% notice or report · 1

Across Wisconsin, 54% of violations are missed or late tests and 5% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Benzene2021-01-01 · Benzene: measured 23.45 UG/L vs limit 5.50 UG/L (4.3×)2020-10-01 · Benzene: measured 112.00 UG/L vs limit 5.50 UG/L (20.4×)2020-10-01 · Benzene: measured 55.73 UG/L vs limit 5.50 UG/L (10.1×)2020-07-01 · Benzene: measured 37.70 UG/L vs limit 5.50 UG/L (6.9×)2020-04-01 · Benzene: measured 20.58 UG/L vs limit 5.50 UG/L (3.7×)2020-01-01 · Benzene: measured 37.30 UG/L vs limit 5.50 UG/L (6.8×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

5.9 ppb
1.8 ppb
1.4 ppb

Every violation on record

  1. 2021-01-01BenzeneMCL, Averagemeasured 23.45 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file
  2. 2020-10-01BenzeneMCL, Single Samplemeasured 112.00 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file
  3. 2020-10-01BenzeneMCL, Averagemeasured 55.73 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file
  4. 2020-07-01BenzeneMCL, Averagemeasured 37.70 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file
  5. 2020-04-01BenzeneMCL, Averagemeasured 20.58 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file
  6. 2020-03-27Public NoticePN Violation without NPDWR ViolationBack in compliance
  7. 2020-01-01BenzeneMCL, Single Samplemeasured 37.30 UG/L · limit 5.50 UG/LPeriod ended · no return to compliance on file

System details

Population served365
Service connections135
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityLa Valle
EPA ZIP on file53941

Areas served

  • La Valle, Sauk County

Reading this record

La Valle Waterworks is a community water system that draws from groundwater and serves about 365 people in La Valle, Wisconsin. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.